Ghost instabilities in self-interacting vector fields: The problem with proca fields
Massive vector fields feature in several areas of particle physics, eg, as carriers of weak
interactions, dark matter candidates, or an effective description of photons in a plasma. Here …
interactions, dark matter candidates, or an effective description of photons in a plasma. Here …
I-Love-Q relations in neutron stars and their applications to astrophysics,<? format?> gravitational waves, and fundamental physics
The exterior gravitational field of a slowly rotating neutron star can be characterized by its
multipole moments, the first few being the neutron star mass, moment of inertia, and …
multipole moments, the first few being the neutron star mass, moment of inertia, and …
Spin-induced dynamical scalarization, descalarization, and stealthness in scalar-Gauss-Bonnet gravity during a black hole coalescence
Particular couplings between a scalar field and the Gauss-Bonnet invariant lead to
spontaneous scalarization of black holes. Here, we continue our work on simulating this …
spontaneous scalarization of black holes. Here, we continue our work on simulating this …
xTras: A field-theory inspired xAct package for mathematica
T Nutma - Computer Physics Communications, 2014 - Elsevier
We present the tensor computer algebra package xTras, which provides functions and
methods frequently needed when doing (classical) field theory. Amongst others, it can …
methods frequently needed when doing (classical) field theory. Amongst others, it can …
Gravitational two-loop counterterm is asymptotically safe
Weinberg's asymptotic safety scenario provides an elegant mechanism to construct a
quantum theory of gravity within the framework of quantum field theory based on a non …
quantum theory of gravity within the framework of quantum field theory based on a non …
Quasinormal modes and their excitation beyond general relativity
The response of black holes to small perturbations is known to be partially described by a
superposition of quasinormal modes. Despite their importance to enable strong-field tests of …
superposition of quasinormal modes. Despite their importance to enable strong-field tests of …
Computer algebra in gravity research
MAH MacCallum - Living reviews in relativity, 2018 - Springer
The complicated nature of calculations in general relativity was one of the driving forces in
the early development of computer algebra (CA). CA has become widely used in gravity …
the early development of computer algebra (CA). CA has become widely used in gravity …
From a locality-principle for new physics to image features of regular spinning black holes with disks
Current observations present unprecedented opportunities to probe the true nature of black
holes, which must harbor new physics beyond General Relativity to provide singularity-free …
holes, which must harbor new physics beyond General Relativity to provide singularity-free …
An effective formalism for testing extensions to General Relativity with gravitational waves
A bstract The recent direct observation of gravitational waves (GW) from merging black holes
opens up the possibility of exploring the theory of gravity in the strong regime at an …
opens up the possibility of exploring the theory of gravity in the strong regime at an …
xPert: computer algebra for metric perturbation theory
D Brizuela, JM Martin-Garcia… - General Relativity and …, 2009 - Springer
We present the tensor computer algebra package xPert for fast construction and
manipulation of the equations of metric perturbation theory, around arbitrary backgrounds. It …
manipulation of the equations of metric perturbation theory, around arbitrary backgrounds. It …